Github user maryannxue commented on a diff in the pull request: https://github.com/apache/phoenix/pull/154#discussion_r57269271 --- Diff: phoenix-core/src/main/java/org/apache/phoenix/compile/SubselectRewriter.java --- @@ -202,14 +204,30 @@ private SelectStatement flatten(SelectStatement select, SelectStatement subselec } } } - + OffsetNode offset = select.getOffset(); + if (offset != null) { + if (offsetRewrite == null) { + offsetRewrite = offset; + } else { + Integer offsetValue = OffsetCompiler.compile(null, select); + Integer offsetValueSubselect = OffsetCompiler.compile(null, subselect); + if (offsetValue != null && offsetValueSubselect != null) { + offsetRewrite = offsetValue < offsetValueSubselect ? offset : offsetRewrite; + } else { + return select; + } + } + } + --- End diff -- Not sure if this would be correct. Suppose we have "select * from (select a from t offset 2 limit 8) offset 3", guess we should return the 5th row instead. If you consider the logic is too complicated to optimize at compiletime, you can simply quit flattening.
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